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92 Avaya Application Solutions IP Telephony Deployment Guide
S8700-series fiber-PNC configuration for higher availability
When used with the MCC1 and SCC1 Media Gateways, the S8700-series Server has the
following reliability options:
● Standard reliability configuration
● High reliability configuration
● Critical reliability configuration
Standard reliability configuration
The standard reliability option is the most basic option, which consists of the following
components:
● Two S8700-series Servers
● Server-to-IPSI control is not duplicated
● One UPS unit for each S8700-series Server. Using two UPS units ensures that a single
UPS failure or repair operation does not disable the system.
● One IPSI in each IPSI-connected port network
● Circuit-switched traffic between port networks is carried on a simplex network that is made
up of one Expansion Interface (EI) in each port network. The EIs are cabled with lightguide
fiber to either the Center Stage Switch (CSS) or an Asynchronous Transfer Mode (ATM)
switch.
Figure 28:
S8700-series fiber-PNC in a standard reliability configuration on page 93 shows an
example of a standard reliability configuration.